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以溶胶凝胶法制备Fe掺杂TiO_2(Fe-TiO_2)并将其负载于旋转盘反应器的圆盘表面,用于降解苯酚质量浓度为100mg/L的废水。采用X射线衍射光谱、拉曼光谱、扫描电镜、紫外-可见漫反射光谱等分析手段对制备的催化剂进行了表征,并考察了掺杂量和焙烧温度对其催化性能的影响。结果表明,Fe~(3+)进入TiO_2晶格内部替代了Ti4+,引起晶体内部缺陷增加,拓宽了光响应范围,提高了纳米光催化剂的光催化活性。掺杂量0.5(wt)%和焙烧温度600℃时制备的负载型Fe-TiO_2催化剂具有较高催化活性,用于降解1L苯酚溶液,循环处理2h后苯酚的降解率可达75%,较纯TiO_2提高20%以上。
Fe-doped TiO 2 (Fe-TiO 2) was prepared by sol-gel method and was loaded on the disk surface of a rotating disk reactor to degrade the wastewater with phenol concentration of 100 mg / L. The prepared catalysts were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and UV-vis diffuse reflectance spectroscopy. The effects of doping amount and calcination temperature on the catalytic performance were also investigated. The results show that Fe ~ (3+) enters the interior of TiO 2 instead of Ti 4+, which leads to the increase of internal defects, widens the range of light response and enhances the photocatalytic activity of the nanosized photocatalyst. The prepared Fe-TiO_2 catalyst with 0.5% (wt) doping amount and 600 ℃ calcination temperature has a high catalytic activity for degradation of 1-liter phenol solution, and the degradation rate of phenol can reach 75% TiO 2 increased by more than 20%.